No GSM signal in my BLU Life 8 recently unpacked

I got the error message: service error - 44 1b 21, after installing the SIM. No signal is obtained in my new BLU Life 8. Thanks for your support!

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1
crwdns2934285:0crwdne2934285:0